Here's what characterizes free fall:
* Constant acceleration: The acceleration due to gravity (approximately 9.8 m/s²) acts uniformly on the object, causing its velocity to increase at a constant rate.
* Negligible air resistance: Air resistance, also known as drag, is considered insignificant, so it doesn't affect the object's motion.
* Straight line motion: The object falls in a straight line, vertically downward.
Note: In reality, air resistance is almost always present to some degree. However, the concept of free fall is a useful idealization for understanding the basic principles of gravity and motion.
